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A.C. susceptibility as a probe of low-frequency magnetic dynamics

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AC_Susceptibility_Paper_Accepted.pdf (3.981Mb)
Date
30/11/2018
Author
Topping, C. V.
Blundell, S. J.
Keywords
Magnetic measurements
A.C. susceptibility
Spin glass
Single molecule magnet
Superconductor
Spin ice
QC Physics
T Technology
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Abstract
The experimental technique of a.c. susceptibility can be used as a probe of magnetic dynamics in a wide variety of systems. Its use is restricted to the low-frequency regime and thus is sensitive to relatively slow processes. Rather than measuring the dynamics of single spins, a.c. susceptibility can be used to probe the dynamics of collective objects, such as domain walls in ferromagnets or vortex matter in superconductors. In some frustrated systems, such as spin glasses, the complex interactions lead to substantial spectral weight of fluctuations in the low-frequency regime, and thus a.c. susceptibility can play a unique role. We review the theory underlying the technique and magnetic dynamics more generally and give applications of a.c. susceptibility to a wide variety of experimental situations.
Citation
Topping , C V & Blundell , S J 2018 , ' A.C. susceptibility as a probe of low-frequency magnetic dynamics ' , Journal of Physics: Condensed Matter , vol. 31 , no. 1 , 013001 . https://doi.org/10.1088/1361-648X/aaed96
Publication
Journal of Physics: Condensed Matter
Status
Peer reviewed
DOI
https://doi.org/10.1088/1361-648X/aaed96
ISSN
0953-8984
Type
Journal item
Rights
© 2018, IOP Publishing Ltd. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1088/1361-648X/aaed96
Description
We are grateful to EPSRC (UK) for financial support.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/19036

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